Fluctuating mast production does not drive Scandinavian brown bear behavior
ABSTRACT Bears often rely on soft or hard mast during fall hyperphagia when they increase body mass in preparation for winter hibernation. Studies of North American and Japanese bear populations suggest they respond to years of mast crop failure by increasing movement rates and roaming farther, with...
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crwiley:10.1002/jwmg.21619 2024-06-02T08:15:38+00:00 Fluctuating mast production does not drive Scandinavian brown bear behavior Hertel, Anne G. Zedrosser, Andreas Kindberg, Jonas Langvall, Ola Swenson, Jon E. Austrian Science Fund 2018 http://dx.doi.org/10.1002/jwmg.21619 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjwmg.21619 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jwmg.21619 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jwmg.21619 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor The Journal of Wildlife Management volume 83, issue 3, page 657-668 ISSN 0022-541X 1937-2817 journal-article 2018 crwiley https://doi.org/10.1002/jwmg.21619 2024-05-03T11:41:52Z ABSTRACT Bears often rely on soft or hard mast during fall hyperphagia when they increase body mass in preparation for winter hibernation. Studies of North American and Japanese bear populations suggest they respond to years of mast crop failure by increasing movement rates and roaming farther, with an increase in human–wildlife conflicts. In southcentral Sweden, brown bears ( Ursus arctos ) primarily feed on bilberry ( Vaccinium myrtillus ) and lingonberry ( V. vitis‐idaea ) during hyperphagia. We hypothesized that berry production affects movement, activity, and space use behaviors of bears in Sweden, which have the potential to increase human–bear encounters. We tested whether seasonal activity patterns, human settlement visits, and clearcut selection ratios were affected by bilberry and lingonberry productivity between 2007 and 2017 with linear and generalized linear mixed effect models. Contrary to our expectations, we did not find that bears moved more or maintained larger home ranges in years of low berry production. Bears were slightly more active in years of higher bilberry production, but variation in behavior was primarily explained by demographic group and individual differences. Bears rarely visited human settlements and the number of visits did not increase in relation to shortage of natural foods. Likewise, population‐level selection for clearcuts was unrelated to berry production but reflected a differential food search behavior in the 2 peak berry seasons, with higher clearcut selection ratios during the lingonberry season. Only 12 bears regularly used agricultural fields, which were too few to relate field visits to berry production, but all bears visited fields more often during the later lingonberry season. We suggest that weaker fluctuations in berry production, a continuous spatial distribution of berries, and an apparent absence of forage‐limiting exploitative intra‐ or interspecific competition contribute to brown bears in Scandinavia being less food limited than bears in North America or ... Article in Journal/Newspaper Ursus arctos Wiley Online Library The Journal of Wildlife Management 83 3 657 668 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT Bears often rely on soft or hard mast during fall hyperphagia when they increase body mass in preparation for winter hibernation. Studies of North American and Japanese bear populations suggest they respond to years of mast crop failure by increasing movement rates and roaming farther, with an increase in human–wildlife conflicts. In southcentral Sweden, brown bears ( Ursus arctos ) primarily feed on bilberry ( Vaccinium myrtillus ) and lingonberry ( V. vitis‐idaea ) during hyperphagia. We hypothesized that berry production affects movement, activity, and space use behaviors of bears in Sweden, which have the potential to increase human–bear encounters. We tested whether seasonal activity patterns, human settlement visits, and clearcut selection ratios were affected by bilberry and lingonberry productivity between 2007 and 2017 with linear and generalized linear mixed effect models. Contrary to our expectations, we did not find that bears moved more or maintained larger home ranges in years of low berry production. Bears were slightly more active in years of higher bilberry production, but variation in behavior was primarily explained by demographic group and individual differences. Bears rarely visited human settlements and the number of visits did not increase in relation to shortage of natural foods. Likewise, population‐level selection for clearcuts was unrelated to berry production but reflected a differential food search behavior in the 2 peak berry seasons, with higher clearcut selection ratios during the lingonberry season. Only 12 bears regularly used agricultural fields, which were too few to relate field visits to berry production, but all bears visited fields more often during the later lingonberry season. We suggest that weaker fluctuations in berry production, a continuous spatial distribution of berries, and an apparent absence of forage‐limiting exploitative intra‐ or interspecific competition contribute to brown bears in Scandinavia being less food limited than bears in North America or ... |
author2 |
Austrian Science Fund |
format |
Article in Journal/Newspaper |
author |
Hertel, Anne G. Zedrosser, Andreas Kindberg, Jonas Langvall, Ola Swenson, Jon E. |
spellingShingle |
Hertel, Anne G. Zedrosser, Andreas Kindberg, Jonas Langvall, Ola Swenson, Jon E. Fluctuating mast production does not drive Scandinavian brown bear behavior |
author_facet |
Hertel, Anne G. Zedrosser, Andreas Kindberg, Jonas Langvall, Ola Swenson, Jon E. |
author_sort |
Hertel, Anne G. |
title |
Fluctuating mast production does not drive Scandinavian brown bear behavior |
title_short |
Fluctuating mast production does not drive Scandinavian brown bear behavior |
title_full |
Fluctuating mast production does not drive Scandinavian brown bear behavior |
title_fullStr |
Fluctuating mast production does not drive Scandinavian brown bear behavior |
title_full_unstemmed |
Fluctuating mast production does not drive Scandinavian brown bear behavior |
title_sort |
fluctuating mast production does not drive scandinavian brown bear behavior |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/jwmg.21619 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjwmg.21619 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jwmg.21619 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jwmg.21619 |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
The Journal of Wildlife Management volume 83, issue 3, page 657-668 ISSN 0022-541X 1937-2817 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jwmg.21619 |
container_title |
The Journal of Wildlife Management |
container_volume |
83 |
container_issue |
3 |
container_start_page |
657 |
op_container_end_page |
668 |
_version_ |
1800739876163813376 |